Start off with a G major chord and strum for 3 beats of the measure. On the fourth beat, take your first finger off the 5th string, 2nd fret and move it to the 4th string, 2nd fret and mute the 5th string with the pad of your 2nd finger. You will now be play notes of (from low to high): G x e g b g for a chord by the name of "G6"
Then go back to the G major chord for the first beat of the next measure.
You can use this G6 chord in a lot of other applications, too - not just this one tune by Mr. Dylan. Try it out when strumming to yourself, or when you're trying to come up with an idea for a new song.
It's fun and sounds kind of cool, too.






